Concealed door hinge



Oct. 311, 1961 ZLJZ R.BRYDOLF CONCEALED DOOR HINGE Filed Aug. 1, 1958 L46 5a 2\ 34 56 Li hvvmvroxa Ross/PT BRYDOLF BY H/S HTTORNEYS. HARE/s,K/acH, Fosrse; He ems United States Patent 3,006,039 CUNCEALED DOORHINGE Robert Brydolf, Pasadena, Calif, assignor, by mesne assignments,to M & H Industries, Anaheim, Calif, a corporation of California FiledAug. 1, 1958, Ser. No. 752,566 2 Claims. (Cl. 2016) The presentinvention relates in general to concealed, or substantially concealed,door hinges and, more particularly, to door hinges of this type whichare of particular utility in connection with lip doors, such a doorhaving a central body insertable into a door frame adjacent an innerframe surface thereof and having a marginal lip adapted to overlie afront surface of the frame.

. A primary object of the invention is to provide a hinge which isconcealed, or substantially concealed, in a groove which is formed inthe rear surface of the door adjacent and perpendicular to one edge ofthe door body and which extends across the lip of the door into the doorbody.

An important object of the invention is to provide a sheet metal hingehaving door and frame leaves respectively including flat, parallel doorand frame arms pivotally interconnected at adjacent ends thereof, thedoorarm being positioned in the groove in the rear surface of the doorand the frame arm being positioned in such groove when the door isclosed.

Another object is to provide the door and frame leaves with fiat doorand frame flanges adjacent the other ends of the door and frame arms,respectively, the door and frame flanges being perpendicular to the doorand frame arms, respectively, and extending therefrom in oppositedirections. The door flange is seated flat against the rear surface ofthe door body and the frame flange is seated flat against the innersurface of the frame, the frame flange being disposed between such innerframe surface and the corresponding edge of the door body when the.

door body is inserted into the frame upon closure'of the door.

Another object is to provide a hinge of the foregoing character whichpermits both vertical and horizontal adjustment of the position of thedoor relative to the door frame after the door is hung.

More particularly, an object is to provide the door and frame flangeswith elongated door screw and frame screw slots, respectively, which areperpendicular to each other and which receive door and frame screws,respectively, extending into the rear surface of the door body and intothe inner frame surface, respectively. A further object in thisconnection is to provide a hinge wherein the door screw slot isperpendicular to the pivot axis of the hinge and wherein the frame screwslot is parallel thereto. With this construction, the door may beadjusted horizontally relative to the frame by moving the door screwhorizontally in the door screw slot after the door screw is insertedinto the rear surface of the door body, and the door may be adjustedvertically relative to the frame by moving .the frame screw slotvertically relative to the frame screw after the latter has beeninserted into the inner frame surface. The door and frame flanges arealso provided with round door and frame screw holes to receive door andframe screws, respectively, which fix the door in position after theforegoing adjustments have been made.

Another important object of the invention is to provide the frame armwith an edge seated against the front surface of the frame and providedwith a marking prong inserted into such front surface. With thisconstruction, after mounting the hinge on the door, the door is placedin the frame, whereupon the marking prong is inserted into the frontsurface of the frame so that the 7 point at which at least one of theframe screws is to be inserted into the inner frame surface may readilybe located by means of a template, for example, utilizing the mark madeby the marking prong as a reference point.

The foregoing objects, advantages, features and results of the presentinvention, together with various other objects, advantages, features andresults thereof which will be evident to those skilled in the art towhich the invention relates, maybe attained with the embodiment of theinvention described in detail hereinafter and illustrated in theaccompanying drawing, in which:

FIG. 1 is an elevational view of a door hung by means of two hinges ofthe invention;

FIG. 2 is an enlarged, fragmentary sectional view taken along either ofthe arrowed lines 2-2 of FIG. 1 and illustrating a hinge of theinvention, the door being shown in its closed position;

FIG. 3 is an elevational view showing the hinge attached to an innersurface of the door frame and a rear surface of the door with the doorin its open position; and

FIG. 4 is a perspective view of the door hinge of the invention.

1 In the drawing, the numeral 10 designates a door frame having a frontsurface 12 and an inner surface 14,

- i.e., having a surface 14 which faces inwardly relative to the dooropening provided by the door frame.

The numeral 16 designates a lip door comprising a central body 18insertable into the frame 10 adjacent the inner frame surface 14 andcomprising a marginal lip 20 which overlies the front surface 12 of theframe when the doorv is closed. In the particular constructionillustrated, the lip 20 is substantially rectangular in cross sectionand is provided with only a slightly rounded corner 22 at the frontsurface 24 of the door. However, the corner 22 may be roundedconsiderably more than shown, i.e., may have a considerably largerradius than shown, if 180 opening of the door 16 is desired.

The rear surface of the door 16, which is designated generally by thenumeral 26, is provided therein adjacent and perpendicular to one edge28 of the door body 18 with a groove 30 extending across the lip 20 intothe door body. (With a more rounded corner than the corner 22, thegroove 30 will extend through the lip 20 to the front surface of thedoor.) The groove 30 is provided with side walls 32 and is provided witha front wall 34 which extends more or less diagonally from the rearsurface 26 of the door toward the front surface 24 thero-f in adirection toward the rounded corner 22 of the lip 20 of the door.

The invention includes a sheet metal hinge 36 having a door leaf 38 anda frame leaf 40, the door leaf comprising a flat door arm 42 positionedin the groove 30 and having adjacent one end thereof a flat door flange44 perpendicular to the door arm and seated against the rear surface,46, of the body 18 of the door 16. The frame leaf 40 comprises a flat,generally L-shaped frame arm 48 parallel to the door arm 42 andinsertable into the groove 30 when the door 16 is closed, the frame leafalso including adjacent one end of the frame arm 48 aflat frame flange50 perpendicular to the frame arm and seated against the inner framesurface 14. The frame flange 50 is disposed between the inner framesurface 14 and the edge 28 of the door body 18 when I the door isclosed.v

flanges 44 and 50. The pivot means 52 is shown as comprising a pivot pin54;

The door and frame flanges 44 and 50 extend from the door and frame arms42 and 48, respectively, in opposite directions. With the constructionillustrated, the'door and frame flanges 44 and 50 are perpendicular toeach other when the door 16' is closed, as shown in FIG. 2, and areparallel to each other-when the door has been swung open through anangle of 90, as shown in FIG. 3.

The foregoing structural interrelation between the various parts of thedoor and frame leaves 38 and 40, the groove 30 in the door 16, the rearsurface 46 of the door body 18, and the inner surface-14 of theframe 10,results in a compact hinge structure which is substantially entirelyconcealed within thegroove 30.

The door flange 44 is secured to the rear body surface 46 of the door 16by screws 56 and 58 respectively extending into the rear body surfacethrough an elongated slot 60 and a round hole 62, the slot 60 beingperpenldicular to the edge 28 of the door body 18 and to the pivot axisprovided by the pivot means 52. The frame flange 5 0 is secured to theinner frame surface 14 by means of screws 64 and 66 respectivelyextending into the inner frame surface through an elongated slot 68 anda round hole 7i} in the frame flange, the slot 68 being parallel to thepivot axis and perpendicular to the slot 60. With this construction, theposition of the door 16 may be adjusted relative to the frame 10 bothhorizontally and vertically after installing the screws 56 and 64 in theslots 60 and 68. After the desired adjustment has been effected, thescrews 58 and 66 are installed in the holes 62 and 70 to maintain thedesired adjustment.

In order to mark the location of the points where the screws 64 and 66are to be threaded into the inner frame surface 14, the frame arm 48 isprovided with an edge 72, within the generally L-shaped angle formed bythe frame arm, having thereon a marking prong 74 adapted to penetratethe front surface 12 of the frame 10. The marking prong 74' is utilizedto mark the front surface 12 of the frame 10 after the hinge 36 has beenmounted on the door 16 by means of the screw 56, as'will be described inmore detail hereinafter,

Considering the manner in which the hinge 36 is installed, the door arm42 is placed inthe groove in the position shown in the drawing with thedoor flange 44 seated against the rear body surface 46. Thereafter, thescrew 56 is inserted into the slot 60 in the door flange 44 and isdriven into the rear body surface 46. Then,

the door is inserted into the frame 10 with the frame leaf '40 in theposition shown in FIG. 2, whereby the marking prong 74 penetrates thefront surface 12 of the door frame. Subsequently, the door 16 iswithdrawn from the door frame 10 and, by means of a suitable template,which may be a frame. leaf 40, the point at which the screw 64 is to bedriven into the inner frame surface 14 is located with reference to themark made by the marking prong 74. Thereafter, with the door leaf 18 inthe position of FIG. 3 relative to the frame leaf 40, the screw 64 isinserted into the slot 68 in the frame flange 50 and is driven into theinner frame surface 14 at the previously located point.

The foregoing accomplished, the door 16 is adjusted vertically andhorizontally relative to the door frame 10 by moving the door leaf 38horizontally relative to the door, as permitted by the slot 60, and bymoving the frame leaf 40 vertically relative to the frame 10, aspermitted by the slot 68. Once the door has been adjusted properly, thescrews 56 and 64 are tightened and the screws 58 and 66 are installed.

Although an exemplary embodiment of the invention has been disclosedherein, it will be understood that various minor changes, modificationsand substitutions may be incorporated in such embodiment withoutdeparting from the spirit of the invention as defined by the claimswhich follow.

I claim:

1. In combination with a door frame having an inner frame surface and adoor having a central body insertable into said frame adjacent saidinner frame surface and having a marginal lip adapted to overlie a frontsurface of said frame, said door having a rear surface and having in itsrear surface and adjacent and perpendicular to one edge of said body agroove extending across said lip into said body, said body having a rearbody surface, a sheet metal hinge and fastening means therefor,including: a door leaf comprising a flat door arm positioned in saidgroove and having adjacent one end thereof a flat door flangeperpendicular to said door arm and seated against rear body surface,said door flange having therein door screw openings; door screwsextending through said door screw openings and inserted into said rearbody surface to fasten said door flange to said rear body surface; aframe leaf comprising a flat, generally L-shaped frame arm parallel tosaid door arm and insertable into said groove and having adjacent oneend thereof a flat frame flange perpendicular to said frame arm andseated against said inner frame surface, said frame flange beingdisposed between said inner frame surface and said edge of said bodywhen said body is inserted into said frame,said frame flange havingtherein frame screw openings, said frame arm having adjacent the otherend thereof an edge seated against said front surface of said frame andprovided With a pointed marking prong extending generally toward saidframe flange, but spaced from and parallel to the plane thereof, andinserted into said front surface of said frame; frame screwsextendingthrough said frame screw openings and insertedinto said inner framesurface to fasten said frame flange tosaid inner frame surface; andpivot means pivotally interconnecting the other ends of said door andframe arms and providing a pivot axis perpendicular to said door andframe arms and parallel to said door 7 andframe flanges.

I 2, A sheet metal hinge, including: ,a door leaf comprising a flat dooram having adjacent one end thereof a flat door flange perpendicular, tosaid door arm; a frame leaf comprising; a flat, generally L-shaped framearm parallel to said door arm and havingadjacent one end thereof a flatframe flange perpendicular to said frame arm, said frame arm havingadjacent the other end thereof an edge provided with a pointed markingprong extendingrgenerally toward said frame flange, but spaced from andparallel to the plane thereof; and pivot means pivotally interconnectingthe other ends-of said door and frame arms and providing a pivot axisperpendicular to said, door and frame arms and parallel to said door andframe flanges.

References Cited, in the file of this patent UNITED STATES PATENTS

